Klaus

Occupation: Spy
Affiliation: Lamplight, Inferno

Klaus is one of the main protagonists in the Spy Classroom series. He is the boss of Lamplight and a former member of Inferno, who re-established Lamplight after Inferno was wiped out. Self-proclaimed "the Greatest Spy in the World". Despite being "the Greatest Spy in the World", he is terrible at teaching as he does things intuitively.